<template>
  <div>
    <h3>添加商品</h3>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <br />
    <el-card>
      <!-- 消息提示 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条组件 -->
      <!-- align-center(居中效果) -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          @tab-click="tabClicked"
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <!-- 选择商品分类的级联选择框 -->
              <el-cascader
                expandTrigger="hover"
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" :key="item.attr_id" v-for="item in manyData">
              <!-- 使用数组渲染复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="val" v-for="(val,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <!-- 循环生成静态属性 -->
            <el-form-item :label="item.attr_name" v-for="item in onlyData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :on-success="addPic"
              :headers="headers"
              list-type="picture"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce">123123</quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from "lodash";
export default {
  data() {
    return {
      headers: {
        Authorization: window.sessionStorage.getItem("token")
      },
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        //商品的详情介绍
        goods_introduce: "",
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" }
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" }
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" }
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" }
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" }
        ]
      },
      //用来保存分类数据
      cateList: [],
      //配置级联菜单中数据如何展示
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children"
      },
      activeIndex: "0",
      manyData: [],
      onlyData: [],
      //保存预览图片的url地址
      previewPath: "",
      //控制预览图片对话框的显示和隐藏
      previewVisible: false
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //获取分类列表
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败");
      }
      this.cateList = res.data;
    },
    // 选择分类之后触发的事件
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
        return;
      }
    },
    //Tab切换之前的判断
    beforeTabLeave(now, old) {
      if (old === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请选择商品分类");
        return false;
      }
    },
    async tabClicked() {
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "many" } }
        );

        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败");
        }
        console.log(res);
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyData = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "only" } }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态属性列表失败");
        }
        this.onlyData = res.data;
      }
    },
    //查看图片大图
    handlePreview(f) {
      this.previewPath = f.response.data.url;
      this.previewVisible = true;
    },
    //删除图片的方法
    handleRemove(f) {
      console.log(f);
      const fPath = f.response.data.tmp_path;
      const index = this.addForm.pics.findIndex(item => {
        item.pic === fPath;
      });
      this.addForm.pics.splice(index, 1);
      console.log(this.addForm);
    },
    //添加图片成功返回的方法
    addPic(req) {
      console.log(req);
      const pic = { pic: req.data.tmp_path };

      this.addForm.pics.push(pic);
      console.log(this.addForm);
    },
    add() {
      // console.log(this.addForm);
      this.$refs.addFormRef.validate(async val => {
        if (!val) {
          return this.$message.error("请填写必要的表单");
        }
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        this.manyData.forEach(item => {
          form.attrs.push({
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" ")
          });
        });
        this.onlyData.forEach(item => {
          form.attrs.push({
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          });
        });
        console.log(form);
        
        //发送请求完成商品的添加,商品名称必须是唯一的
        const { data: res } = await this.$http.post("goods", form);
        console.log(res);
        
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg);
        }
        this.$message.success("添加商品成功");
        //编程式导航跳转到商品列表
        this.$router.push("/goods");
      });
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return [];
    }
  }
};
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 8px 0 0 !important;
}
.btnAdd {
  margin-top: 10px;
}
</style>